38 



eral of the Nbctuadce, and have completed accurate drawings 

 of the nervures from specimens in my collection ; and I delay 

 completing my labors in this department only till I can obtain 

 a better knowledge of the larvse and their habits ; for where a 

 marked' difference obtains in these I have fomid a correspond- 

 ing difference in neuration ; and on these principles united 

 (together with other easy characters taken from the imago), I 

 should wish the genera which I may propose to be established. 



The small Chremastocheilus you sent me last summer, which 

 had white spots on the elytra, and appeared to be a variety of 

 C. Hentzii^ is certainly a distinct species, and comes nearer to the 

 C. castanece than any other I have seen. Knofch remarks that 

 such spots existed in a specimen which had not been rubbed. 

 The form of the posterior part of the thorax and its angles and 

 punctures are different from those of C. SeiitzU, although it 

 resembles it so closely in many respects. The one you sent 

 me in a letter also somewhat resembles the C castmiece ; but 

 from Kirby's figure and description of the variolosus, I judge it 

 to be identical with the latter. Kirbj' has described C. Hentzii 

 by the name of O. canalicidatuSy but besides his not noticing 

 the white spots of that species, his description was posterior 

 to mine, and your name must be retained as the specific 

 designation. 



C castanece? mi, Kirby calls C. Harrisii', it is certainly most 

 distincit from the true C. castanea: of Knocli. 



HENTZ TO HARRIS. 



CiiAPEL Hill, Oct. 24, 1828. 



I tliank you for your very accurate design of the Dysdera. 

 I liave no^x one hundred and four drawings of that family, and 

 think I have not more than two thirds of our American spi- 

 ders. The circumstance of your finding the young with the 



